RHEL

Add extra repositories:

$ sudo yum install yum-plugin-priorities
$ curl https://raw.github.com/jlhg/galaxy-preinstall/master/add_extra_repo.sh | sudo bash

Set the priorities of CentOS-Base and EPEL repos:

• Add priority=10 to each section in /etc/yum.repos.d/CentOS-Base.repo.

  E.g.

[base]
name=CentOS-$releasever - Base
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
#baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
priority=10

#released updates
[updates]
name=CentOS-$releasever - Updates
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
#baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6
priority=10

...

• Add priority=20 to each section in /etc/yum.repos.d/epel.repo.

Update packages:

$ sudo yum update

Install packages:

$ sudo yum install -y $(curl https://raw.github.com/jlhg/galaxy-preinstall/master/rhel-pkg.txt)